#!/bin/bash
set -euo pipefail

remote="refs/remote/$(git remote -v | grep fetch | grep 'emqx/emqx' | awk '{print $1}')"
latest_release=$(git describe --tags "$(git rev-list --tags --max-count=1 --remotes="$remote")")

bad_app_count=0

get_vsn() {
    commit="$1"
    app_src_file="$2"
    if [ "$commit" = 'HEAD' ]; then
        if [ -f "$app_src_file" ]; then
            grep vsn "$app_src_file" | grep -oE '"[0-9]+.[0-9]+.[0-9]+"' | tr -d '"' || true
        fi
    else
        git show "$commit":"$app_src_file" 2>/dev/null | grep vsn | grep -oE '"[0-9]+.[0-9]+.[0-9]+"' | tr -d '"' || true
    fi
}

while read -r app_path; do
    app=$(basename "$app_path")
    src_file="$app_path/src/$app.app.src"
    old_app_version="$(get_vsn "$latest_release" "$src_file")"
    ## TODO: delete it after new version is released with emqx app in apps dir
    if [ "$app" = 'emqx' ] && [ "$old_app_version" = '' ]; then
        old_app_version="$(get_vsn "$latest_release" 'src/emqx.app.src')"
    fi
    now_app_version="$(get_vsn 'HEAD' "$src_file")"
    ## TODO: delete it after new version is released with emqx app in apps dir
    if [ "$app" = 'emqx' ] && [ "$now_app_version" = '' ]; then
        now_app_version="$(get_vsn 'HEAD' 'src/emqx.app.src')"
    fi
    if [ -z "$now_app_version" ]; then
        echo "failed_to_get_new_app_vsn for $app"
        exit 1
    fi
    if [ -z "${old_app_version:-}" ]; then
        echo "skiped checking new app ${app}"
    elif [ "$old_app_version" = "$now_app_version" ]; then
        lines="$(git diff --name-only "$latest_release"...HEAD \
                    -- "$app_path/src" \
                    -- "$app_path/priv" \
                    -- "$app_path/c_src")"
        if [ "$lines" != '' ]; then
            echo "$src_file needs a vsn bump (old=$old_app_version)"
            echo "changed: $lines"
            bad_app_count=$(( bad_app_count + 1))
        fi
    fi
done < <(./scripts/find-apps.sh)

if [ $bad_app_count -gt 0 ]; then
    exit 1
else
    echo "apps version check successfully"       
fi
